The 1877 monotype "Les Choristes" (The Chorus Singers) by Edgar Degas is distinctive for at least two reasons.
First, the French impressionist depicted dancers so often that this work is the only operatic scene he painted that omits them.
Second, it was stolen in a mysterious December 2009 heist after thieves unscrewed it from the wall one night at Musée Cantini in Marseille, leading investigators to speculate that the theft could be an inside job.
The trail had grown cold over the years, as French customs investigators tried in vain to find the artwork, valued at more than US$1 million ($1.4m). Yet on February 16, it was not discovered at a shady auction house or the vault of an art thief, but inside a suitcase in the back of a bus at a highway stop near Paris.
Customs officials were performing a random search of the bus luggage compartment when they found a suitcase containing the work, bursting with vivid hues of orange, yellow and red, depicting chorus singers in the opera "Don Juan."